Baked Cod with Butternut Squash

Featured in: Garden-Inspired Meals

This dish features tender cod fillets baked atop sweet roasted butternut squash and wilted spinach. A rich, tangy tomato-herb sauce envelops the ingredients, adding vibrant Mediterranean flavors. Roasting the squash softens it perfectly, while the spinach adds a fresh, leafy texture. The balanced blend of oregano, thyme, and smoked paprika complements the mild fish, making for a wholesome, nutritious meal ideal for weeknights or simple entertaining.

Updated on Mon, 17 Nov 2025 16:51:00 GMT
Golden baked cod with butternut squash and spinach, all resting in rich tomato-herb sauce. Pin
Golden baked cod with butternut squash and spinach, all resting in rich tomato-herb sauce. | toastybasil.com

Tender cod fillets baked atop sweet roasted butternut squash and wilted spinach, all nestled in a vibrant tomato-herb sauce. A wholesome, flavorful meal perfect for weeknights or entertaining.

The first time I made this cod bake, it was for a weeknight dinner with my family. The aromas of fresh herbs and tomato filled our kitchen, and everyone went back for seconds. This recipe quickly became one of our most-requested meals for casual gatherings and special occasions alike.

Ingredients

  • Cod fillets: 4 pieces (about 150 g / 5 oz each), skinless and boneless
  • Butternut squash: 500 g (1 lb), peeled and cut into 1.5 cm (½-inch) cubes
  • Fresh baby spinach: 120 g (4 cups)
  • Yellow onion: 1 medium, finely chopped
  • Garlic cloves: 2, minced
  • Canned crushed tomatoes: 400 g (14 oz)
  • Tomato paste: 2 tbsp
  • Olive oil: 2 tbsp, divided
  • Dried oregano: 1 tsp
  • Dried thyme: 1 tsp
  • Smoked paprika: ½ tsp (optional)
  • Sea salt: ½ tsp, plus more to taste
  • Freshly ground black pepper: ¼ tsp
  • Sugar or maple syrup: 1 tsp (optional, to balance acidity)
  • Fresh parsley: 2 tbsp, chopped (plus extra for garnish)
  • Lemon wedges: For serving
  • Freshly cracked black pepper: For serving

Instructions

Prepare oven and baking dish:
Preheat oven to 200°C (400°F) and lightly grease a large ovenproof dish.
Roast butternut squash:
Toss butternut squash cubes with 1 tbsp olive oil, a pinch of salt, and pepper. Spread evenly in the baking dish and roast for 15 minutes, until just starting to soften.
Cook aromatics:
While squash roasts, heat 1 tbsp olive oil in a skillet over medium heat. Sauté onion for 3,4 minutes until translucent. Add garlic and cook for 1 minute more.
Make tomato-herb sauce:
Stir in tomato paste and cook for 1 minute. Add crushed tomatoes, oregano, thyme, smoked paprika, salt, pepper, and sugar or maple syrup if using. Simmer for 5 minutes to develop flavors.
Assemble bake:
Remove squash from oven. Scatter spinach over squash and pour tomato-herb sauce evenly over vegetables.
Add cod:
Nestle cod fillets on top, season fish lightly with salt and pepper. Cover dish loosely with foil.
Bake:
Bake for 15,18 minutes, or until cod is opaque and flakes easily with a fork.
Finish and serve:
Remove foil, sprinkle with fresh parsley, and serve with lemon wedges.
A close-up image shows tender Baked Cod, a healthy, flavorful Mediterranean meal ready to serve. Pin
A close-up image shows tender Baked Cod, a healthy, flavorful Mediterranean meal ready to serve. | toastybasil.com

Sharing this cod bake with my family brings back memories of cozy Mediterranean-inspired dinners. It's a dish everyone loves to scoop right from the baking dish onto their plates.

Flavor Variations

For gentle heat, add a pinch of chili flakes before baking. Substitute the cod with haddock, pollock, or halibut for a different protein, or mix up the herbs for your favorite combinations.

Serving Suggestions

This bake pairs perfectly with lemon wedges and a side of quinoa, brown rice, or gluten-free bread to soak up the savory sauce.

Nutritional Highlights

Each serving yields about 295 calories, 7 g total fat, 23 g carbohydrates, and 34 g protein, making for a balanced main dish that fits many dietary preferences.

Vibrant Baked Cod with butternut squash and spinach, served with fresh parsley and lemon wedges nearby. Pin
Vibrant Baked Cod with butternut squash and spinach, served with fresh parsley and lemon wedges nearby. | toastybasil.com

Bright, fresh, and oh-so comforting, this cod bake is sure to be a staple at your table. Enjoy the ease and flavor in every bite!

Recipe Q&A

What type of fish works best for this dish?

Skinless, boneless cod fillets are ideal for baking due to their mild flavor and tender texture. Haddock, pollock, or halibut can be used as alternatives.

How do I prepare butternut squash for roasting?

Peel and cut the butternut squash into 1.5 cm cubes, toss with olive oil, salt, and pepper, then roast at 200°C (400°F) until beginning to soften, about 15 minutes.

Can I adjust the herbs in the tomato sauce?

Yes, dried oregano and thyme provide a Mediterranean profile, but you can modify these to suit your taste or use fresh herbs for a brighter flavor.

Is this dish suitable for gluten-free diets?

Yes, it is naturally gluten-free as it contains no wheat or gluten ingredients.

How can I add extra heat to this meal?

Adding a pinch of chili flakes to the tomato-herb sauce or sprinkling on top before serving provides gentle heat without overpowering the flavors.

What are good serving suggestions to complement this dish?

It pairs well with quinoa, brown rice, or crusty gluten-free bread for a satisfying meal.

Baked Cod with Butternut Squash

Tender cod with roasted butternut squash and spinach topped with a tomato-herb sauce.

Prep duration
20 min
Cooking duration
35 min
Complete duration
55 min


Skill level Easy

Origin Mediterranean-Inspired

Yield 4 Portions

Dietary specifications Dairy-free, Gluten-free, Low-Carb

Components

Fish & Vegetables

01 4 skinless, boneless cod fillets (5 oz each)
02 1 lb butternut squash, peeled and cut into ½-inch cubes
03 4 cups fresh baby spinach
04 1 medium yellow onion, finely chopped
05 2 garlic cloves, minced

Tomato-Herb Sauce

01 14 oz canned crushed tomatoes
02 2 tbsp tomato paste
03 2 tbsp olive oil
04 1 tsp dried oregano
05 1 tsp dried thyme
06 ½ tsp smoked paprika (optional)
07 ½ tsp sea salt, plus extra to taste
08 ¼ tsp freshly ground black pepper
09 1 tsp sugar or maple syrup (optional)
10 2 tbsp fresh parsley, chopped

For Serving

01 Lemon wedges
02 Freshly cracked black pepper

Directions

Step 01

Prepare Oven and Baking Dish: Preheat oven to 400°F. Lightly grease a large ovenproof dish.

Step 02

Roast Butternut Squash: Toss butternut squash cubes with 1 tbsp olive oil, salt, and pepper. Spread evenly in the dish and roast for 15 minutes until starting to soften.

Step 03

Sauté Aromatics: Heat 1 tbsp olive oil in a skillet over medium heat. Cook onion until translucent, about 3–4 minutes. Add garlic and cook for 1 minute more.

Step 04

Simmer Tomato-Herb Sauce: Stir in tomato paste and cook 1 minute. Add crushed tomatoes, oregano, thyme, smoked paprika, salt, pepper, and optional sweetener. Simmer for 5 minutes to develop flavors.

Step 05

Assemble Vegetables and Sauce: Remove roasted squash from oven. Spread spinach evenly over squash and pour tomato-herb sauce on top.

Step 06

Add Cod Fillets: Place cod fillets on top of the vegetables. Season lightly with salt and pepper. Cover loosely with foil.

Step 07

Bake Cod: Bake covered for 15–18 minutes until cod is opaque and flakes easily.

Step 08

Garnish and Serve: Remove foil, sprinkle with chopped parsley, and serve with lemon wedges and freshly cracked pepper.

Necessary tools

  • Large ovenproof baking dish
  • Skillet
  • Chef's knife
  • Cutting board
  • Foil

Allergy information

Review each component for possible allergens and if uncertain, we recommend consulting with a healthcare professional.
  • Contains fish

Nutrient breakdown (per portion)

These values are provided as a general guide and shouldn't replace professional medical advice.
  • Calories: 295
  • Fat: 7 g
  • Carbs: 23 g
  • Protein: 34 g